Connectivity of sparse vehicular ad hoc networks with channel randomness

作     者：米振强 Yang Yang An Jianwei Liu Guangjun 

作者机构：Department of Information Engineering University of Science and Technology Beijing Beijing 100083 P.R. China Department of Aerospace Engineering Ryerson University Toronto Canada M5A 2C9 

出 版 物：《High Technology Letters》 (高技术通讯（英文版）)

年 卷 期：2010年第16卷第4期

页      面：389-394页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Supported by the National Natural Science Foundation of China (No. 60873192 61070182) 

主　　题：vehicular ad hoc networks (VANETs) queuing theory broadcast percolation distance log-normal shadowing connectivity 

摘      要：In this paper, we investigate the connectivity of vehicular ad hoc networks in free-flow traffic situation with channel randonmess. In order to illustrate the realistic environment, we consider that vehicles are distributed in free-flow highway according to a Poisson point process, and signal propagation between connected vehicles is subjected to log-normal shadowing effects. We obtain the distribution of the space headway between successive vehicles and the distribution of signal coverage, which allows us to use the equivalent M/G/z~ queue theory to model the connectivity of VANETs in the form of average broadcast percolation distance and average number of connected nodes. Then, extensive simulation studies are conducted to evaluate the obtained results. The analytical model presented here is able to describe the impact of various system parameters, including traffic parameters and signal propagation parameters on the con- nectivity. We use our analytical results, along with the common signal propagation data, to understand impact of channel randomness on the connectivity of VANETs.